I recently faced an BR0252E/BR0253E issue during SSFS configuration in ASM for BR*Tools. If you are experiencing the same problem and you don't know how to proceed, check the KBA #2096534 I've created.
Firtsly, please note that in ASM, the Oracle Software owner is 'oracle', therefore BR*Tools SSFS needs to be owned by 'oracle' user. The mentioned KBA detailed the resolution steps you should take and also contains useful refernces/notes.
Hope you like this blog and any comments/suggestions are welcome!